djvu | 24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad

Analysis

max time kernel
149s
max time network
191s
platform
windows10_x64
resource
win10v20210408
submitted
22/09/2021, 13:20

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General

Target
24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
Size 790KB
Sample210922-qk46eafcgr
SHA256 24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad
MD5 7bf350b51060d91b753c82f9dd2105e8
SHA1 8f2e2c6b0b3eccea09dd5035282a4615e4278f5c
SHA512 807d54e11b7f1bc9299ee38a7c576f464bae36d0b99c074f4071f7d243bcc5464f658618528133683c46305e943b0b6d922715a92180ac6bf2d6c2ab63234772
MD5 SHA1 SHA512

Score

10^/10

djvu vidar 517 discovery persistence ransomware stealer suricata

Malware Config

Extracted

Family

vidar

Version

40.8

Botnet

https://pavlovoler.tumblr.com/

Attributes

profile_id
517

Signatures

Detected Djvu ransomware 6 IoCs

resource	yara_rule
behavioral2/memory/1644-115-0x0000000000424141-mapping.dmp	family_djvu
behavioral2/memory/1644-114-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1400-116-0x00000000009E0000-0x0000000000AFB000-memory.dmp	family_djvu
behavioral2/memory/1644-117-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/3556-122-0x0000000000424141-mapping.dmp	family_djvu
behavioral2/memory/3556-123-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata

Vidar Stealer 4 IoCs

stealer

resource	yara_rule
behavioral2/memory/3848-131-0x0000000000400000-0x00000000004D7000-memory.dmp	family_vidar
behavioral2/memory/3848-132-0x00000000004A033D-mapping.dmp	family_vidar
behavioral2/memory/3848-135-0x0000000000400000-0x00000000004D7000-memory.dmp	family_vidar
behavioral2/memory/2956-134-0x0000000000870000-0x0000000000944000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2956	build2.exe
3848	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2796	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8f56f5b1-0cc4-473c-9c05-b3e36443651e\\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe\" --AutoStart"	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	api.2ip.ua
14	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1400 set thread context of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 3808 set thread context of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 2956 set thread context of 3848	2956	build2.exe	80

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1736	3848	WerFault.exe	80

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
3556	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
3556	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe
1736	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	1736	WerFault.exe
Token: SeBackupPrivilege	1736	WerFault.exe
Token: SeDebugPrivilege	1736	WerFault.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1400 wrote to memory of 1644	1400	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	70
PID 1644 wrote to memory of 2796	1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	71
PID 1644 wrote to memory of 2796	1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	71
PID 1644 wrote to memory of 2796	1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	71
PID 1644 wrote to memory of 3808	1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	72
PID 1644 wrote to memory of 3808	1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	72
PID 1644 wrote to memory of 3808	1644	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	72
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3808 wrote to memory of 3556	3808	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	76
PID 3556 wrote to memory of 2956	3556	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	77
PID 3556 wrote to memory of 2956	3556	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	77
PID 3556 wrote to memory of 2956	3556	24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe	77
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80
PID 2956 wrote to memory of 3848	2956	build2.exe	80

C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
"C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1400
- C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
  "C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1644
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\8f56f5b1-0cc4-473c-9c05-b3e36443651e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2796
- - C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
    "C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3808
  - - C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe
      "C:\Users\Admin\AppData\Local\Temp\24e01f6ef65d42467608a1db86f06cdbeb114ba6b6da744d5133c7d933adaaad.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:3556
    - - C:\Users\Admin\AppData\Local\52232f00-33f3-4f4f-9c5b-5c933519691f\build2.exe
        
        "C:\Users\Admin\AppData\Local\52232f00-33f3-4f4f-9c5b-5c933519691f\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:2956
      - C:\Users\Admin\AppData\Local\52232f00-33f3-4f4f-9c5b-5c933519691f\build2.exe
        
        "C:\Users\Admin\AppData\Local\52232f00-33f3-4f4f-9c5b-5c933519691f\build2.exe"
        6⤵
        Executes dropped EXE
        
        PID:3848
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3848 -s 1088
        7⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1736

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1400-116-0x00000000009E0000-0x0000000000AFB000-memory.dmp

Download

memory/1644-117-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/1644-114-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2956-134-0x0000000000870000-0x0000000000944000-memory.dmp

Download

memory/3556-123-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3848-131-0x0000000000400000-0x00000000004D7000-memory.dmp

Download

memory/3848-135-0x0000000000400000-0x00000000004D7000-memory.dmp

Download